Patent GB-464586-A (GB)
Title: Improvements in machines for making cartons
IPC: B31B17/00
Filed: 1935-11-18
Abstract: 464,586. Making paper &c. cream-tubs &c. WOOD, D., and D.W. CONTAINERS, Ltd. Nov. 18, 1935, No. 31900. [Class 18] In a machine for inserting bottoms into paper, cardboard, &c. cartons with open circular ends and of cylindrical, frusto-conical pyramidal or other shape, e.g. milk bottles or cream-tubs, the cartons x, Figs. 1, 2, 3 and 4 are fed from a forming machine indicated symbolically by a rotary standard 65, Figs. 1 and 2, by devices 111 into pockets 13 on an intermittently rotated drum 10 controlled by a Geneva mechanism 11, 12, grooved by means of the transfer devices 111 or by plungers 14, disc bottoms inserted by plungers 16, the edge beaded by rollers 43 and ejected by plungers 66 on to a conveyer 71. The bottom may be inserted in the wide or narrow end of the carton which is subsequently made liquid-tight by proofing with wax &c. The drum may have two or more sets of pockets spaced laterally along the drum axis. The machine shown has two such sets. Transferring cartons from the former to the bottoming machine. Blanks formed around mandrels 67 on the rotary standard 65 are passed one by one, on to a holder 112 having conical seatings for two cartons, by a reciprocating member 111 actuated by a link 114 from a lever 115 driven by a face cam 116 synchronized with the movements of the forming machine. After receiving the first carton the holder 112 moves laterally so that the next movement of member 111 carries a second carton onto the second section and thence by a continued movement into a pocket 13 while the first carton is transferred into an adjacent pocket at the same level by a transfer device 113 actuated from cam 116 by a lever 117 secured to a rock-shaft 118. Holder 112 is oscillated by a bell-crank 119 pivoted at 120 and actuated by a cam 121 on the same shaft 122 as the face cam 116. Grooving. The member 111 may function to groove the cartons, or punches 14 may be provided for this purpose, which may also function to force the cartons into the pocket 13 if bodies of frusto-conical or cylindrical shape are to be given a pyramidal or prismatic form. Inserting disc bottoms. Vertical plungers 16 cut discs 15 of paper or cardboard &c. from webs 17, 18 drawn from rolls 19, 20 across ring-discs 21 by rollers 22 and a gear wheel 23 on drum 10. The plungers 16 carry discs 15 either down to the narrow end of the carton which is inturned by the forming machine or is grooved on to a groove in the wide end. Each plunger 6 has an outer sleeve 24 slidable in a fixed guide barrel 25, and has a central passage 26 through which suction is applied to the lower end when the plunger descends. Actuation is by a lever 27 rocking on a pivot 28 under control of a lever arm 29 having its roller-fitted end engaged by a cam 30. Sleeve 24 is actuated by a lever 31 pivoted at 32 and connected by a link 33 to a rocking lever 34 actuated by a link 35 from a bellcrank 36 whose roller-end is engaged by cam 30, Fig. 1. Stops for the discs are provided by two caps 38, carrying projections 42, on a lever 39 actuated by a cam 40 on the driving shaft 41 of the Geneva mechanism. Beading the carton edges. The projecting edges of the carton are inturned by beading rollers 43, Fig. 4, on a rotary head 44 advanced radially by a bell-crank 49 whose roller-end engages the cam 30, spindle 45 being driven by an electric motor 48 through pinion 47 and gear-wheel 48 which has wide teeth to accommodate the radial movement. Smoothing the beaded edge. At the fifth position a rotary plunger 50 which co-operates with a groove 51 in the wall of the pocket to produce a groove for the sealing disc, moves inwards. Its spindle 53, slidable in guides 54, carries a rotary head 55 having grooving rollers 56, and is advanced by lever 57 actuated by cam 58 ; it also carries a loose cone 59 which holds the carton while spindle 53 driven by motor 60 causes grooving rollers 56 to run round the end of the carton. The rollers are pressed outwards by a cone 61 slidable by a cam-actuated lever 62, and are normally held inwards by springs 63. Heating coils' 64 energized electrically from slip-rings 65, may be mounted on the rotary head. Ejecting cartons. Plungers 66 within the drum actuated by the system 67, 68, 69 from a cam 70 on shaft 41, push the narrow ends of the carton and transfer them to a conveyer 71 which leads them to the proofing apparatus. If the disc is secured in the wide end it is preferably flanged by ring die 21 and secured by rolling the rim at one or more of the fourth, fifth and sixth positions. Pressure may be applied radially to produce a neat finish. Main drive. Timing is effected by cams on driving shaft 41 which may be driven by bevels 72 on the same shaft as the forming machine.